habit vs fit out

habit is a noun but fit out is not a noun.

Word	Noun	Adjective	Verb	Adverb
habit	Yes	No	Yes	No
fit out	No	No	Yes	No

As verbs, fit out is a hypernym of habit; that is, fit out is a word with a broader meaning than habit:

Other hypernyms of habit include apparel, clothe, dress, enclothe, garb, garment, habilitate, raiment, tog.

habit (noun)	fit out (noun)
excessive use of drugs
(psychology) an automatic pattern of behavior in reaction to a specific situation; may be inherited or acquired through frequent repetition
a distinctive attire worn by a member of a religious order
attire that is typically worn by a horseback rider (especially a woman's attire)
an established custom
the general form or mode of growth (especially of a plant or crystal)

habit (verb)	fit out (verb)
put a habit on	provide with clothes or put clothes on
	provide with (something) usually for a specific purpose